Note
Operation under special atmospheric conditions
Ultrasonic measurement requires that the sound wave travel through the atmosphere in a
consistent manner. Applications with atmospheric conditions different from air (including, but
not limited to, gas layer stratification, very high methane or CO
2
concentrations), should be
properly assessed to ensure safe, reliable use in the event of measurement errors due to sound
wave velocity changes.
3.3
Use in hazardous areas
Qualified personnel for hazardous area applications
Persons who install, connect, commission, operate, and service the device in a hazardous
area must have the following specific qualifications:
● They are authorized, trained or instructed in operating and maintaining devices and systems
according to the safety regulations for electrical circuits, high pressures, aggressive, and
hazardous media.
● They are authorized, trained, or instructed in carrying out work on electrical circuits for
hazardous systems.
● They are trained or instructed in maintenance and use of appropriate safety equipment
according to the pertinent safety regulations.
WARNING
Use in hazardous area
Risk of explosion.
● Only use equipment that is approved for use in the intended hazardous area and labelled
accordingly.
● Don't use devices that have been operated outside the conditions specified for hazardous
areas. If you have used the device outside the conditions for hazardous areas permanently
make all Ex markings unrecognizable on the nameplate.
Safety notes
3.3 Use in hazardous areas
SITRANS Probe LU240 with mA/HART
Compact Operating Instructions, 10/2018, A5E42673704-AB
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